I want my pressed buttons to look pressed, but I am looking to make it as easy as possible by modifying the default button from the Metal look and feel in Photoshop. From there I could simply use the jbutton.setPressedIcon() method and tell it to use the modified button when it's pressed. I've had no luck, I googled a bunch, search Stack Overflow a bunch, and checked the documentation for the JDK file structure at http://docs.oracle.com/javase/6/docs/technotes/tools/linux/jdkfiles.html.
I'm on a Mac OS X Lion box, but I figured the linux file structure would be similar and it is, it just doesn't reference anything related to look and feel or images in general.
Of course I tried digging around in the jdk folder using finder, and found lots of stuff there, but no images that I can edit.